The present invention relates to test ports and, more particularly, to test ports for use with conventional gasoline/diesel fuel dispensers.
From time to time the pressurized line system found in conventional petroleum fueling sites, such as gasoline/diesel fuel pumps/dispensers. These fueling sites include a mechanical line leak detector that must be tested to ensure proper functioning. To test these detectors, access to the pressurized line system is necessary. Additionally, such access is required for general inspections and troubleshooting to determine the cause of a fault.
For safety reasons, every dispenser includes an impact/shear valve located slightly below grade beneath each fuel dispenser. The primary function of this valve is to stop the flow of pressurized fuel if the dispenser is struck or dislodged due to accident or otherwise. Because these valves are commonly made of soft cast metal, any seam may split and any threads are easily stripped creating a need to replace these valves.
It is not unusual for a technician to obtain fluid communication with the pressurized line system by removing a plug from the impact/shear valve and inserting therein a test probe. By removing such a plug to gain access to the threaded opening in the impact/shear valve, fuel will be discharged as a function of the line pressure. This creates an obvious mechanical hazard for the technician, a fire hazard for the immediate environment, evaporation of the fuel degrades the air quality and the spilled fuel potentially creates ground or ground water pollution.
To reduce the line pressure by removing the plug requires good judgment and patience. If the plug is turned too many times to vent the line pressure, the plug may be sufficiently dislodged to become a projectile and potentially injuring a technician or surrounding personnel or objects. While many pressurized line systems have a high bulk modulus (rapid change of pressure for a relatively small amount of fuel), a significant number of pressurized lines have flexible lines, many flexible connectors, trapped vapor, or any combination thereof which may require thirty minutes or more to safely bleed the line to allow safe access to the line system. To avoid the hazards of removing a plug from the impact/shear valve, some technicians have replaced the plug with a quick connect fitting. A hose is attached thereto to drain fuel discharged from the pressurized line system into a container. While this solution avoids an inadvertent spray of fuel, other issues are created.
In an attempt to protect the quick connect valve, a cover is often employed. Nevertheless, the opening of the impact/shear valve to mount the quick connect fitting was always dangerous. Secondarily, the integrity of a quick connect fitting may be damaged during an impact to the gasoline/diesel fuel dispenser. With the integrity of the quick connect fitting compromised, their location provides an unfortunate flow path that defeated the purpose of the impact/shear valve supporting the damaged quick connect fitting. These damaged quick connect fittings have caused destruction of property and loss of life. Therefore, fire and safety personnel have precluded these quick connect fittings from being installed and often have required existing quick connect fittings to be removed. Thus, technicians have had to revert to removing a plug from the impact/shear valve to perform the required tests and the attendant safety hazards continue to exist.
The present invention is directed to an apparatus for locating a test port at a high line of entry in a conventional gasoline/diesel fuel dispenser for vehicles to reduce pressure in the line. A test port is threadedly engaged with a mounting for a standard fuel filter and includes a threaded boss for supporting the filter therebeneath. A quick connect fitting is threadedly engaged with the mounting and in communication with the fuel attendant the filter. The quick connect fitting serves as a pressure relief for testing a conventional mechanical line leak detector and for the first time, enables the leak detector to be tested with most if not all the actual head pressure present in the line system.
The test port may be fixed to a threaded coupler in the cabinet which may be set between two, preferably horizontal, conduits. The conduits may be at an equal height above the ground. The test port may include a collar preferably threadedly engaged to the coupling, and preferably set below the coupling, within the cabinet. The cabinet may also hose a plurality of vertical pipes, set below the coupling. A threaded boss may extend below the collar for threadedly engaging a filter. The test port collar may include a circular cross-section and have an outer, cylindrical, face with a plurality of threaded ports radially displayed on the outer face. A container may be set below the test port, above the ground, and preferably on the platform or within the cabinet, to receive fluid from a tube connected to the test port.
It is therefore a primary object of the present invention to enhance the accuracy of field testing of a line leak detector.
Another object of the present invention is to reduce the likelihood of spilled fuel during testing of a fuel line in a conventional gasoline/diesel fuel dispenser.
Another object of the present invention is to reduce the likelihood of spilled fuel during routine maintenance work including changing fuel filters in a conventional gasoline/diesel fuel dispenser.
Still another object of the present invention is to provide a test port in a collar in threaded engagement with the mounting for a filter in a conventional gasoline/diesel fuel dispenser and provide threaded support for such filter.
Yet another object of the present invention is to provide a test port in a collar disposed intermediate the fuel line of a conventional gasoline/diesel fuel dispenser and a filter for the fuel.
A further object of the present invention is to provide a ratchet operable fitting for threadedly engaging and disengaging a collar for a test probe with the mounting for a conventional filter in the fuel line of a conventional gasoline/diesel fuel dispenser.
A yet further object of the present invention is to manually stabilize a collar threadedly attached to a mounting in the fuel line of a conventional gasoline/diesel fuel dispenser during threaded engagement/disengagement of a filter with the collar.
A still further object of the present invention is to provide a test port for a conventional gasoline/diesel fuel dispenser at a location equal to the actual, or most of the actual head pressure generated by the static weight of the fuel.
These and other objects of the present invention will become apparent to those skilled in the art as the description thereof proceeds.
The present invention will be described with greater specificity and clarity with reference to the following drawings, in which:
Referring to
Referring jointly to
During testing, tubing 54 is temporarily connected with quick disconnect fitting 52 to relieve the pressure of the fuel within conduit 40. The fuel flowing through the tubing is discharged into a suitable container, such as cup 56. Preferably cup 56 is set within cabinet 12 above ground. For safety reasons, a clamp 58 or the like may be used to secure end 60 of the tubing to the cup to prevent spillage. Once the pressure within conduit 40 has been relieved, further outflow of fuel through tubing 54 will not occur. On completion of subsequent tests to be performed, the contents of cup 56 may be returned to the main fuel tank (not shown) or other depository.
Referring jointly to
In operation, fuel flowing through conduit 40 enters coupling 42 and is distributed into vertical passageways 78. The fuel then flows into filter 44 through inlets 80 and through the filter element within filter 44 to exit through hollow boss 76 and into hollow boss 62 of coupling 42. Thereafter, the fuel is channeled into conduit 46 for ultimate dispensation through one of the hoses of the dispenser and through the respective handle.
As described above, collar 50 threadedly supports a filter for the fuel to be dispensed. The collar is threadedly secured to coupling 42. Previously, only filters mating with coupling 42 could be used. The use of a collar, intermediate the coupling and the filter, permits use of a collar that is configured to threadedly engage a filter other than what would be required to mate with coupling 42. Thereby, collar 50 can be reconfigured for use in the manner of an adapter to secure various filters to the coupling.
Collar 50 includes a plurality of threaded passageways 84. Each unused ones of these through the passageways is sealed by a threaded plug 86. Quick disconnect fitting 52 may be coupled to adapter 100, and further includes a hollow threaded end 88 for threaded engagement with one of threaded passageways 84. Thereby, the quick disconnect fitting is in fluid communication with the interior of collar 50 and the fluid therein. The quick disconnect fitting will prevent fuel flow therethrough until it is engaged by the mating half of the quick disconnect fitting.
Referring to
It is noted that rod 72 engaging a corresponding one of cavity 68 in the collar may be used to threadedly engage the collar with coupling 42. However, it is preferable to use installation tool 110 to secure the collar with the coupling. To ensure sealed engagement between filter 44 and collar 50, the rod may be used to stabilize the collar while the filter is attached and detached through use of a conventional strap wrench. Thereby, even partial disengagement of the collar from the coupling is avoided by stabilizing the coupling with rod 72 during unthreading of the filter from the collar. The quick disconnect fitting and cylinder 96 serving as a cover with attached lanyard 102 are shown in
For reference.
The present application includes subject matter disclosed in and claims priority to divisional application Ser. No. 15/867,440, filed Jan. 10, 2018, entitled “Test Port For Fuel Dispenser” (now U.S. Pat. No. 11,034,571), and U.S. patent application Ser. No. 14/459,834, filed Aug. 14, 2014, entitled “Test Port For Fuel Dispenser” (now U.S. Pat. No. 9,878,895), both incorporated herein by reference, and both describing inventions made by the present inventor.
Number | Date | Country | |
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Parent | 14459834 | Aug 2014 | US |
Child | 15867440 | US |
Number | Date | Country | |
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Parent | 15867440 | Jan 2018 | US |
Child | 17348710 | US |